How many terms are in the expression 20x + 9y

Write 225,120,000 in scientific notation

17. Find all the real fourth roots of 0.0001.

Solve for x. 3x = - 39 Can someone tell me the steps

The value of y varies directly with x, and y = 12 when x = - 6. Find y when x = - 4. A. - 8 B. 8 C. 6 D. - 6

A square countertop has a side length of 28 inches. Find the perimeter and area of the countertopusong the correct number of significant digits.

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.